1.Perfect OE-Spec Fit 

• OEM Part Number:  11122-54020
• Precision-ground and machined in strict accordance with OE tolerances, inner and outer diameter specifications, and overall length. The outer diameter is precisely engineered for the required interference fit with the cylinder head bore, while the inner bore cylindricity and surface finish are strictly controlled to ensure smooth press-fit installation and accurate valve stem movement without binding or misalignment.

2.Excellent Heat Dissipation & Self-Lubricating Properties for Reduced Wear

• Manufactured from premium powder-metallurgy alloy material with excellent thermal conductivity, allowing heat absorbed by the valve to be efficiently transferred to the cylinder head and its cooling passages. Superior self-lubricating properties also help reduce friction and wear on the valve stem for reliable long-term operation.

3.Maintains Excellent Sealing to Help Prevent Oil Leakage & Oil Burning

• Designed to work precisely with the valve stem seal, providing excellent concentricity and stable valve stem support. Helps prevent eccentric movement and vibration during high-speed valve operation, maintaining reliable cylinder sealing while minimizing engine oil migration along the valve guide into the combustion chamber, thereby helping prevent blue exhaust smoke and carbon buildup.

4. Certified Quality – Made in Taiwan

•  Manufactured under stringent production standards and validated through 100% factory inspection to ensure flawless, ready-to-install performance and reliability.